Gián án Dong vat hoc 01

1 Phylum Annelida 2 Segmented Worms • Body divided into repeating segments 3 Sedentary 4 Terrestrial • Earthworm 5 Feed on Blood • Leech 6 Myxozoa Myxozoa Arthropoda Arthropoda Annelida Annelida Mollusca Mollusca Lophophores Lophophores Hemichordata Hemichordata Vertebrata Vertebrata Other Other pseudocoelomates pseudocoelomates Nematoda Nematoda Porifera Porifera Ctenophora Ctenophora Cnidaria Cnidaria Placozoa Placozoa Platyhelminthes Platyhelminthes Nemertea Nemertea Ciliophora Ciliophora Sarcomastigophora Sarcomastigophora Microspora Microspora Apicomplexa Apicomplexa Mesozoa Mesozoa Echinodermata Echinodermata Crustacea Crustacea Chelicerata Chelicerata Uniramia Uniramia Other Chordata Other Chordata 7 Phylum Annelida • Segmented body – metameric • Setae – Absent in leeches • Coelom divided by septa • Closed circulatory system • Nephridia for each segment (metamere) 8 Circulatory Systems 9 Septa Septa Prostomium Prostomium Pygidium Pygidium Peristomium Peristomium Metamerism 10 Trochophore larva Apical tuft Apical tuft Mouth Mouth Anus Anus Ciliary band Ciliary band Stomach Stomach